Why does the Segment Sequence Number remain unchanged (indicated by a horizontal line in the graphs) with every drop in the congestion window?

Why does the Segment Sequence Number remain unchanged (indicated by ahorizontal line in the graphs) with every drop in the congestion window?2) Analyze the graph that compares the Segment Sequence numbers of the threescenarios. Why does the Drop_NoFast scenario have the slowest growth insequence numbers?3) In the Drop_NoFast scenario, obtain the overlaid graph that compares SentSegment Sequence Number with Received Segment ACK Number forServer_West. Explain the graph.Hint:- Make sure to assign all values to the Capture mode of the ReceivedSegment ACK Number statistic.